If x= npi+(-1)^(n)alpha , n in I and x=...

If ` x= npi+(-1)^(n)alpha , n in I and x=npi+(-1)^(n)beta ` are the roots of ` 4 cos x -3 sec x =tan x `, then `4(sin alpha + sin beta )` is

A

`-1`

B

1

C

2

D

None of these

Verified by Experts

The correct Answer is:

A

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